REAR BRAKE
4-30
tem.
1. Remove:
•
Union bolt
•
Copper washer
•
Brake hose
TIP
To drain any remaining brake fluid, place a con-
tainer under the master cylinder and the end of
the brake hose.
EAM30049
CHECKING THE REAR BRAKE MASTER
CYLINDER
1. Check:
•
Brake master cylinder “1”
Damage/scratches/wear
Replace.
•
Brake fluid delivery passages “2”
(brake master cylinder body)
Obstruction
Blow out with compressed air.
2. Check:
•
Master cylinder reservoir cap
Crack/damage
Replace.
•
Brake master cylinder reservoir diaphragm
holder
•
Brake master cylinder reservoir diaphragm
Crack/damage
Replace.
3. Check:
•
Brake hose
Cracks/damage/wear
Replace.
EAM30050
ASSEMBLING THE REAR BRAKE MASTER
CYLINDER
WARNING
EWA13520
• Before installation, all internal brake com-
ponents should be cleaned and lubricated
with clean or new brake fluid.
• Never use solvents on internal brake com-
ponents.
1. Wash the brake master cylinder with brake
fluid.
2. Install:
•
Primary cylinder cup “1”
•
Secondary cylinder cup “2”
(to the brake master cylinder piston “3”)
WARNING
EWA19300
Apply brake fluid to the cylinder cups and in-
stall them as shown. Wrong orientation in in-
stallation causes poor braking performance.
3. Install:
•
Spring “1”
(to the brake master cylinder piston “2”)
TIP
Install the spring with a smaller inside diameter
to the brake master cylinder piston.
4. Install:
•
Brake master cylinder piston assembly “1”
•
Push rod “2”
•
Circlip “3”
Specified brake fluid
DOT 4
1
2
2
3
1
2
3
1
1
2
Summary of Contents for YZ125X 2022
Page 5: ...EAM20162 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY ...
Page 8: ......
Page 10: ......
Page 38: ...MOTORCYCLE CARE AND STORAGE 1 26 ...
Page 54: ...CABLE ROUTING DIAGRAM 2 15 EAM20152 CABLE ROUTING DIAGRAM Frame and engine left side view ...
Page 56: ...CABLE ROUTING DIAGRAM 2 17 Frame and engine right side view ...
Page 58: ...CABLE ROUTING DIAGRAM 2 19 Handlebar front view 0 in 0 mm 0 mm 0 in ...
Page 60: ...CABLE ROUTING DIAGRAM 2 21 Rear brake right side view ...
Page 62: ...CABLE ROUTING DIAGRAM 2 23 ...
Page 90: ...ELECTRICAL SYSTEM 3 26 ...
Page 158: ...CHAIN DRIVE 4 66 ...
Page 202: ...CRANKSHAFT 5 42 seal lip 4 1 2 3 M ...
Page 226: ...CARBURETOR 7 11 ...
Page 231: ...ELECTRICAL COMPONENTS 8 4 EAM30289 CHECKING THE SWITCHES 1 1 Engine stop switch ...
Page 236: ...ELECTRICAL COMPONENTS 8 9 ...
Page 250: ...TROUBLESHOOTING 9 13 ...
Page 268: ......